diff options
| author | Greg Ungerer <gerg@uclinux.org> | 2010-11-09 16:00:17 +1000 |
|---|---|---|
| committer | Greg Ungerer <gerg@uclinux.org> | 2011-01-05 15:19:20 +1000 |
| commit | 4a5bae416562a8224707a1ff30e83ddab1474fb3 (patch) | |
| tree | e827800effdcb4d96a5042aa5540fd5553881775 /arch | |
| parent | 0ef6c9b8f7bf62ea05be5b26ee14b18a116b0c2a (diff) | |
| download | linux-0-day-4a5bae416562a8224707a1ff30e83ddab1474fb3.tar.gz linux-0-day-4a5bae416562a8224707a1ff30e83ddab1474fb3.tar.xz | |
m68knommu: support ColdFire caches that do copyback and write-through
The version 3 and version 4 ColdFire cache controllers support both
write-through and copy-back modes on the data cache. Allow for Kconfig
time configuration of this, and set the cache mode appropriately.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68k/include/asm/m53xxacr.h | 8 | ||||
| -rw-r--r-- | arch/m68k/include/asm/m54xxacr.h | 4 | ||||
| -rw-r--r-- | arch/m68knommu/Kconfig | 24 |
3 files changed, 35 insertions, 1 deletions
diff --git a/arch/m68k/include/asm/m53xxacr.h b/arch/m68k/include/asm/m53xxacr.h index 74c81c9b177e5..d8b8dd68368fa 100644 --- a/arch/m68k/include/asm/m53xxacr.h +++ b/arch/m68k/include/asm/m53xxacr.h @@ -53,6 +53,12 @@ * CACR is cache inhibited, we use the ACR register to set cacheing * enabled on the regions we want (eg RAM). */ +#if defined(CONFIG_CACHE_COPYBACK) +#define CACHE_TYPE ACR_CM_CB +#else +#define CACHE_TYPE ACR_CM_WT +#endif + #ifdef CONFIG_COLDFIRE_SW_A7 #define CACHE_MODE (CACR_EC + CACR_ESB + CACR_DCM_PRE) #else @@ -63,7 +69,7 @@ #define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \ (0x000f0000) + \ - (ACR_ENABLE + ACR_ANY + ACR_CM_CB)) + (ACR_ENABLE + ACR_ANY + CACHE_TYPE)) #define ACR1_MODE 0 /****************************************************************************/ diff --git a/arch/m68k/include/asm/m54xxacr.h b/arch/m68k/include/asm/m54xxacr.h index 6bce82fdb9c31..29d4713f796bb 100644 --- a/arch/m68k/include/asm/m54xxacr.h +++ b/arch/m68k/include/asm/m54xxacr.h @@ -73,7 +73,11 @@ #else #define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC+CACR_EUSP) #endif +#if defined(CONFIG_CACHE_COPYBACK) +#define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_CP) +#else #define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT) +#endif #define INSN_CACHE_MODE (ACR_ENABLE+ACR_ANY) #define CACHE_INIT (CACR_DCINVA+CACR_BCINVA+CACR_ICINVA) diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig index 61c29081b9981..89b12237e1ede 100644 --- a/arch/m68knommu/Kconfig +++ b/arch/m68knommu/Kconfig @@ -82,6 +82,9 @@ config COLDFIRE_SW_A7 config HAVE_CACHE_SPLIT bool +config HAVE_CACHE_CB + bool + source "init/Kconfig" source "kernel/Kconfig.freezer" @@ -172,27 +175,32 @@ config M528x config M5307 bool "MCF5307" select COLDFIRE_SW_A7 + select HAVE_CACHE_CB help Motorola ColdFire 5307 processor support. config M532x bool "MCF532x" + select HAVE_CACHE_CB help Freescale (Motorola) ColdFire 532x processor support. config M5407 bool "MCF5407" select COLDFIRE_SW_A7 + select HAVE_CACHE_CB help Motorola ColdFire 5407 processor support. config M547x bool "MCF547x" + select HAVE_CACHE_CB help Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support. config M548x bool "MCF548x" + select HAVE_CACHE_CB help Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support. @@ -279,7 +287,23 @@ config CACHE_BOTH Split the ColdFire CPU cache, and use half as an instruction cache and half as a data cache. endchoice +endif + +if HAVE_CACHE_CB +choice + prompt "Data cache mode" + default CACHE_WRITETHRU +config CACHE_WRITETHRU + bool "Write-through" + help + The ColdFire CPU cache is set into Write-through mode. + +config CACHE_COPYBACK + bool "Copy-back" + help + The ColdFire CPU cache is set into Copy-back mode. +endchoice endif comment "Platform" |